865929995961 has 8 divisors (see below), whose sum is σ = 1154578512864. Its totient is φ = 577284071520.

The previous prime is 865929995941. The next prime is 865929995963. The reversal of 865929995961 is 169599929568.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-865929995961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (865929995963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 351525 + ... + 1362141.

It is an arithmetic number, because the mean of its divisors is an integer number (144322314108).

Almost surely, 2^865929995961 is an apocalyptic number.

It is an amenable number.

865929995961 is a deficient number, since it is larger than the sum of its proper divisors (288648516903).

865929995961 is a wasteful number, since it uses less digits than its factorization.

865929995961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1296231.

The product of its digits is 850305600, while the sum is 78.

The spelling of 865929995961 in words is "eight hundred sixty-five billion, nine hundred twenty-nine million, nine hundred ninety-five thousand, nine hundred sixty-one".